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360 DVS Series Direct Vent Fireplaces
10006326
Troubleshooting – Honeywell VS8421
START CHECK
Gas Supply On
Pilot Lights With Piezo
Ignitor
• Lockout Has Engaged. Wait 60
Seconds And Try Again.
• For Spark At Electrode While
Depressing Piezo
1/8" Gap To Pilot Hood Needed.
• All Wiring Connections
• Replace Piezo Ignitor
• Supply Line Hooked Up
• Shutoff Valve Open
PILOT STAYS LIT
• For Air In The Lines
• Thermopile Needs A Min.
325mv. Adjust Pilot Flame
Height.
• All Wiring Connections
• Replace Thermopile
• Thermocouple Needs A Min. Of
14mv
PILOT LIGHTS MAIN
BURNER
• Valve Is Turned On
• Wall Switch Is Not Turned On.
Watch For Grounded Wires!
• Thermopile Needs A Min. 325mv.
• Plugged Burner Orifice
• Defective Valve. Turn To Pilot,
Meter Should Read Greater Than
100mv. If Not, Replace.
SYSTEM OK
YES
NO
NO
NO
NO
YES
YES
YES